Theremin: An Electronic Odyssey is a 1993 documentary film directed by Steven M. Martin about the life of Leon Theremin and his invention, the theremin, a pioneering electronic musical instrument. It follows his life, including being imprisoned in a Soviet Gulag, and the influence of his instrument, which came to define the sound of eerie in 20th-century movies, and influenced popular music as it searched for and celebrated electronic music in the 1960s. It was first broadcast in November 1993 as a special edition of Channel 4's Without Walls arts strand.